| Player History |
| 06/01/1989 | Drafted in the 1989 first-year player draft (Round 1, Pick 21, 21st overall pick) by the Houston Astros. |
| 06/19/1989 | Was selected to the 1989 MLB Double A All-Star Game. |
| 11/16/1989 | Received a 1-year contract worth a total of $125,554 through automatic renewal. |
| 01/01/1990 | OSA scouting updated ratings (potential): Stuff: 4 (8); Movement: 5 (6); Control: 2 (4). |
| 04/02/1990 | Named the #37 prospect in the MLB |
| 11/12/1990 | Received a 1-year contract worth a total of $132,274 through automatic renewal. |
| 01/01/1991 | OSA scouting updated ratings (potential): Stuff: 4 (8); Movement: 6 (6); Control: 2 (4). |
| 08/07/1991 | Injured (strained back), day-to-day for 5 days. |
| 11/18/1991 | Received a 1-year contract worth a total of $138,994 through automatic renewal. |
| 01/01/1992 | OSA scouting updated ratings (potential): Stuff: 6 (9); Movement: 6 (7); Control: 3 (4). |
| 06/09/1992 | Pitches a 3-hit shutout against the Trenton Thunder with 9 strikeouts and 3 BB allowed! |
| 06/22/1992 | Was selected to the 1992 MLB Double A All-Star Game. |
| 10/15/1992 | Wins the 1992 MLBAA TL Outstanding Pitcher Award. |
| 01/01/1993 | OSA scouting updated ratings (potential): Stuff: 6 (8); Movement: 6 (7); Control: 3 (4). |
| 05/08/1993 | Injured (herniated disc (back)), day-to-day for 6 days. |
| 10/25/1993 | Signed a 1-year contract extension worth a total of $825,000 with the Houston Astros organization. |
| 01/01/1994 | OSA scouting updated ratings (potential): Stuff: 7 (8); Movement: 6 (6); Control: 4 (4). |
| 06/21/1994 | Pitches a 2-hit shutout against the Colorado Rockies with 5 strikeouts and 3 BB allowed! |
| 08/03/1994 | Pitches a 5-hit shutout against the Colorado Rockies with 8 strikeouts and 1 BB allowed! |
| 09/01/1994 | Wins the MLB NL Pitcher of the Month Award. |
| 10/31/1994 | Signed a 1-year contract extension worth a total of $1,090,000 with the Houston Astros organization. |
| 01/01/1995 | OSA scouting updated ratings (potential): Stuff: 8 (8); Movement: 6 (6); Control: 4 (4). |
| 05/14/1995 | Injured (sore shoulder), out for one week. |
| 07/07/1995 | Strikes out 17 against the San Diego Padres. |
| 07/09/1995 | Was selected to the 1995 Major League Baseball All-Star Game. |
| 09/13/1995 | Injured (shoulder bursitis), out for 4 weeks. |
| 11/02/1995 | Signed a 1-year contract extension worth a total of $3,175,000 with the Houston Astros organization. |
| 01/01/1996 | OSA scouting updated ratings (potential): Stuff: 8 (8); Movement: 6 (6); Control: 4 (4). |
| 09/01/1996 | Wins the MLB NL Pitcher of the Month Award. |
| 09/02/1996 | Injured (mild calf strain), day-to-day for 2 days. |
| 11/22/1996 | Became a free agent. |
| 01/01/1997 | OSA scouting updated ratings (potential): Stuff: 8 (8); Movement: 6 (6); Control: 5 (5). |
| 01/28/1997 | Signed a 3-year contract worth a total of $13,725,000 with the Chicago Cubs organization. |
| 04/25/1997 | Pitches a 6-hit shutout against the Atlanta Braves with 11 strikeouts and 1 BB allowed! |
| 07/15/1997 | Was traded by the Chicago Cubs to the Milwaukee Brewers in exchange for LF Juan Rivera, MR Ricardo Rodriguez. |
| 08/21/1997 | Injured (stomach virus), out for 2 days. |
| 09/02/1997 | Pitches a 3-hit shutout against the New York Yankees with 6 strikeouts and 5 BB allowed! |
| 01/01/1998 | OSA scouting updated ratings (potential): Stuff: 8 (8); Movement: 6 (6); Control: 5 (5). |
| 05/07/1998 | Injured (wrist soreness), day-to-day for one week. |